The Configuration and Safety of Full-Band Signal Jammers in Standardized Examination Halls

Ensuring Fairness and Security in Standardized Exams

In order to safeguard the interests of the majority of candidates and enhance the fairness of examinations, it is necessary to take measures to restrict cheating behaviors by a few individuals. One such measure adopted by examination management departments is the installation of full-band signal jammers. But how should standardized examination halls be equipped with these devices?

Under normal circumstances, we recommend using low-power machines in standard examination halls, with one full-band signal jammer sufficient to cover the entire hall. In cases where the signal strength is strong or the area is large, multiple full-band signal jammers can be used to achieve complete coverage. Some may question how to centrally manage full-band signal jammers in examination centers with multiple halls. We have multiple solutions to address this concern.

Firstly, the existing power line carrier/433MHz wireless communication can be used to manage the full-band signal jammers, enabling functions such as unified software control, timing, and fault alarms. However, some may raise doubts about using 433MHz wireless communication, as the full-band signal jammers block wireless signals. Will this interfere with communication? There is no need to worry about this, as our full-band signal jammers typically have a minimum transmission frequency range of 865-885MHz, which does not interfere with 433MHz wireless signals. It will not affect communication.

Secondly, through TCP/IP protocol, each full-band signal jammer needs to be assigned a fixed IP address. This communication method requires the installation of a network cable for each machine. The use of full-band signal jammers ensures fairness and impartiality in examination halls. However, some parents may feel uneasy about this and worry that it will affect their children’s performance in the college entrance examination (Gaokao). In fact, parents have no need to worry about this aspect. These devices do not harm the health of candidates or examination staff. Moreover, full-band signal jammers can operate silently and will not affect the normal performance of students during the Gaokao.

Whether any electromagnetic wave-emitting device is harmful to the human body depends on the specific absorption rate (SAR) of the human body to electromagnetic waves. The International Commission on Non-Ionizing Radiation Protection (ICNIRP) has set the highest SAR for radiofrequency radiation at 2.0, while China’s standard is 1.5. Currently, the transmission power of wireless communication base stations generally ranges from 40W to 50W. Beyond a distance of 20 to 30 meters from the base station, the specific absorption rate of the human body to electromagnetic waves is below 1.0. On the other hand, the full-band signal jammers used in examination halls are low-power devices with a transmission power generally less than 3W. In this case, the specific absorption rate of the human body to electromagnetic waves is negligible. Furthermore, these full-band signal jammers can operate silently and will not affect the normal performance of students during the Gaokao. Therefore, the use of full-band signal jammers in examination halls does not pose a health risk to individuals.

In conclusion, the configuration of full-band signal jammers in standardized examination halls plays a crucial role in maintaining fairness and security during exams. With proper management and adherence to safety standards, these devices ensure a level playing field for all candidates without compromising their health or performance.